It’s not something that QuickFile supports natively, if you wanted to automate it you’d probably have to script something with the API (e.g. set up the calculations in a Google Sheet and use an apps script timed trigger to call the “create journal” API once a month).
Mathematically wouldn’t the calculation involve a twelfth root somewhere? If you want the balance after 12 months to be 82% of its starting amount then each month you want to multiply it by 0.821/12, which works out as 1.64% depreciation per month.